#include <linux/atomic.h>
#include <linux/byteorder/generic.h>
+#include <linux/errno.h>
#include <linux/etherdevice.h>
#include <linux/fs.h>
#include <linux/if_ether.h>
#include <linux/kref.h>
#include <linux/list.h>
#include <linux/netdevice.h>
+#include <linux/netlink.h>
#include <linux/rculist.h>
#include <linux/rcupdate.h>
#include <linux/seq_file.h>
#include <linux/spinlock.h>
#include <linux/stddef.h>
#include <linux/udp.h>
+#include <net/sock.h>
+#include <uapi/linux/batman_adv.h>
#include "gateway_common.h"
#include "hard-interface.h"
#include "log.h"
+#include "netlink.h"
#include "originator.h"
#include "packet.h"
#include "routing.h"
+#include "soft-interface.h"
#include "sysfs.h"
#include "translation-table.h"
* batadv_gw_node_put - decrement the gw_node refcounter and possibly release it
* @gw_node: gateway node to free
*/
-static void batadv_gw_node_put(struct batadv_gw_node *gw_node)
+void batadv_gw_node_put(struct batadv_gw_node *gw_node)
{
kref_put(&gw_node->refcount, batadv_gw_node_release);
}
-static struct batadv_gw_node *
+struct batadv_gw_node *
batadv_gw_get_selected_gw_node(struct batadv_priv *bat_priv)
{
struct batadv_gw_node *gw_node;
atomic_set(&bat_priv->gw.reselect, 1);
}
-static struct batadv_gw_node *
-batadv_gw_get_best_gw_node(struct batadv_priv *bat_priv)
-{
- struct batadv_neigh_node *router;
- struct batadv_neigh_ifinfo *router_ifinfo;
- struct batadv_gw_node *gw_node, *curr_gw = NULL;
- u64 max_gw_factor = 0;
- u64 tmp_gw_factor = 0;
- u8 max_tq = 0;
- u8 tq_avg;
- struct batadv_orig_node *orig_node;
-
- rcu_read_lock();
- hlist_for_each_entry_rcu(gw_node, &bat_priv->gw.list, list) {
- orig_node = gw_node->orig_node;
- router = batadv_orig_router_get(orig_node, BATADV_IF_DEFAULT);
- if (!router)
- continue;
-
- router_ifinfo = batadv_neigh_ifinfo_get(router,
- BATADV_IF_DEFAULT);
- if (!router_ifinfo)
- goto next;
-
- if (!kref_get_unless_zero(&gw_node->refcount))
- goto next;
-
- tq_avg = router_ifinfo->bat_iv.tq_avg;
-
- switch (atomic_read(&bat_priv->gw.sel_class)) {
- case 1: /* fast connection */
- tmp_gw_factor = tq_avg * tq_avg;
- tmp_gw_factor *= gw_node->bandwidth_down;
- tmp_gw_factor *= 100 * 100;
- tmp_gw_factor >>= 18;
-
- if ((tmp_gw_factor > max_gw_factor) ||
- ((tmp_gw_factor == max_gw_factor) &&
- (tq_avg > max_tq))) {
- if (curr_gw)
- batadv_gw_node_put(curr_gw);
- curr_gw = gw_node;
- kref_get(&curr_gw->refcount);
- }
- break;
-
- default: /* 2: stable connection (use best statistic)
- * 3: fast-switch (use best statistic but change as
- * soon as a better gateway appears)
- * XX: late-switch (use best statistic but change as
- * soon as a better gateway appears which has
- * $routing_class more tq points)
- */
- if (tq_avg > max_tq) {
- if (curr_gw)
- batadv_gw_node_put(curr_gw);
- curr_gw = gw_node;
- kref_get(&curr_gw->refcount);
- }
- break;
- }
-
- if (tq_avg > max_tq)
- max_tq = tq_avg;
-
- if (tmp_gw_factor > max_gw_factor)
- max_gw_factor = tmp_gw_factor;
-
- batadv_gw_node_put(gw_node);
-
-next:
- batadv_neigh_node_put(router);
- if (router_ifinfo)
- batadv_neigh_ifinfo_put(router_ifinfo);
- }
- rcu_read_unlock();
-
- return curr_gw;
-}
-
/**
* batadv_gw_check_client_stop - check if client mode has been switched off
* @bat_priv: the bat priv with all the soft interface information
if (atomic_read(&bat_priv->gw.mode) != BATADV_GW_MODE_CLIENT)
goto out;
+ if (!bat_priv->algo_ops->gw.get_best_gw_node)
+ goto out;
+
curr_gw = batadv_gw_get_selected_gw_node(bat_priv);
if (!batadv_atomic_dec_not_zero(&bat_priv->gw.reselect) && curr_gw)
goto out;
- next_gw = batadv_gw_get_best_gw_node(bat_priv);
+ /* if gw.reselect is set to 1 it means that a previous call to
+ * gw.is_eligible() said that we have a new best GW, therefore it can
+ * now be picked from the list and selected
+ */
+ next_gw = bat_priv->algo_ops->gw.get_best_gw_node(bat_priv);
if (curr_gw == next_gw)
goto out;
void batadv_gw_check_election(struct batadv_priv *bat_priv,
struct batadv_orig_node *orig_node)
{
- struct batadv_neigh_ifinfo *router_orig_tq = NULL;
- struct batadv_neigh_ifinfo *router_gw_tq = NULL;
struct batadv_orig_node *curr_gw_orig;
- struct batadv_neigh_node *router_gw = NULL;
- struct batadv_neigh_node *router_orig = NULL;
- u8 gw_tq_avg, orig_tq_avg;
+
+ /* abort immediately if the routing algorithm does not support gateway
+ * election
+ */
+ if (!bat_priv->algo_ops->gw.is_eligible)
+ return;
curr_gw_orig = batadv_gw_get_selected_orig(bat_priv);
if (!curr_gw_orig)
goto reselect;
- router_gw = batadv_orig_router_get(curr_gw_orig, BATADV_IF_DEFAULT);
- if (!router_gw)
- goto reselect;
-
- router_gw_tq = batadv_neigh_ifinfo_get(router_gw,
- BATADV_IF_DEFAULT);
- if (!router_gw_tq)
- goto reselect;
-
/* this node already is the gateway */
if (curr_gw_orig == orig_node)
goto out;
- router_orig = batadv_orig_router_get(orig_node, BATADV_IF_DEFAULT);
- if (!router_orig)
+ if (!bat_priv->algo_ops->gw.is_eligible(bat_priv, curr_gw_orig,
+ orig_node))
goto out;
- router_orig_tq = batadv_neigh_ifinfo_get(router_orig,
- BATADV_IF_DEFAULT);
- if (!router_orig_tq)
- goto out;
-
- gw_tq_avg = router_gw_tq->bat_iv.tq_avg;
- orig_tq_avg = router_orig_tq->bat_iv.tq_avg;
-
- /* the TQ value has to be better */
- if (orig_tq_avg < gw_tq_avg)
- goto out;
-
- /* if the routing class is greater than 3 the value tells us how much
- * greater the TQ value of the new gateway must be
- */
- if ((atomic_read(&bat_priv->gw.sel_class) > 3) &&
- (orig_tq_avg - gw_tq_avg < atomic_read(&bat_priv->gw.sel_class)))
- goto out;
-
- batadv_dbg(BATADV_DBG_BATMAN, bat_priv,
- "Restarting gateway selection: better gateway found (tq curr: %i, tq new: %i)\n",
- gw_tq_avg, orig_tq_avg);
-
reselect:
batadv_gw_reselect(bat_priv);
out:
if (curr_gw_orig)
batadv_orig_node_put(curr_gw_orig);
- if (router_gw)
- batadv_neigh_node_put(router_gw);
- if (router_orig)
- batadv_neigh_node_put(router_orig);
- if (router_gw_tq)
- batadv_neigh_ifinfo_put(router_gw_tq);
- if (router_orig_tq)
- batadv_neigh_ifinfo_put(router_orig_tq);
}
/**
if (!gw_node)
return;
- kref_get(&orig_node->refcount);
+ kref_init(&gw_node->refcount);
INIT_HLIST_NODE(&gw_node->list);
+ kref_get(&orig_node->refcount);
gw_node->orig_node = orig_node;
gw_node->bandwidth_down = ntohl(gateway->bandwidth_down);
gw_node->bandwidth_up = ntohl(gateway->bandwidth_up);
- kref_init(&gw_node->refcount);
spin_lock_bh(&bat_priv->gw.list_lock);
+ kref_get(&gw_node->refcount);
hlist_add_head_rcu(&gw_node->list, &bat_priv->gw.list);
spin_unlock_bh(&bat_priv->gw.list_lock);
ntohl(gateway->bandwidth_down) % 10,
ntohl(gateway->bandwidth_up) / 10,
ntohl(gateway->bandwidth_up) % 10);
+
+ /* don't return reference to new gw_node */
+ batadv_gw_node_put(gw_node);
}
/**
*
* Return: gateway node if found or NULL otherwise.
*/
-static struct batadv_gw_node *
-batadv_gw_node_get(struct batadv_priv *bat_priv,
- struct batadv_orig_node *orig_node)
+struct batadv_gw_node *batadv_gw_node_get(struct batadv_priv *bat_priv,
+ struct batadv_orig_node *orig_node)
{
struct batadv_gw_node *gw_node_tmp, *gw_node = NULL;
spin_unlock_bh(&bat_priv->gw.list_lock);
}
-/* fails if orig_node has no router */
-static int batadv_write_buffer_text(struct batadv_priv *bat_priv,
- struct seq_file *seq,
- const struct batadv_gw_node *gw_node)
+#ifdef CONFIG_BATMAN_ADV_DEBUGFS
+int batadv_gw_client_seq_print_text(struct seq_file *seq, void *offset)
{
- struct batadv_gw_node *curr_gw;
- struct batadv_neigh_node *router;
- struct batadv_neigh_ifinfo *router_ifinfo = NULL;
- int ret = -1;
+ struct net_device *net_dev = (struct net_device *)seq->private;
+ struct batadv_priv *bat_priv = netdev_priv(net_dev);
+ struct batadv_hard_iface *primary_if;
- router = batadv_orig_router_get(gw_node->orig_node, BATADV_IF_DEFAULT);
- if (!router)
- goto out;
+ primary_if = batadv_seq_print_text_primary_if_get(seq);
+ if (!primary_if)
+ return 0;
- router_ifinfo = batadv_neigh_ifinfo_get(router, BATADV_IF_DEFAULT);
- if (!router_ifinfo)
- goto out;
+ seq_printf(seq, "[B.A.T.M.A.N. adv %s, MainIF/MAC: %s/%pM (%s %s)]\n",
+ BATADV_SOURCE_VERSION, primary_if->net_dev->name,
+ primary_if->net_dev->dev_addr, net_dev->name,
+ bat_priv->algo_ops->name);
- curr_gw = batadv_gw_get_selected_gw_node(bat_priv);
+ batadv_hardif_put(primary_if);
- seq_printf(seq, "%s %pM (%3i) %pM [%10s]: %u.%u/%u.%u MBit\n",
- (curr_gw == gw_node ? "=>" : " "),
- gw_node->orig_node->orig,
- router_ifinfo->bat_iv.tq_avg, router->addr,
- router->if_incoming->net_dev->name,
- gw_node->bandwidth_down / 10,
- gw_node->bandwidth_down % 10,
- gw_node->bandwidth_up / 10,
- gw_node->bandwidth_up % 10);
- ret = seq_has_overflowed(seq) ? -1 : 0;
+ if (!bat_priv->algo_ops->gw.print) {
+ seq_puts(seq,
+ "No printing function for this routing protocol\n");
+ return 0;
+ }
- if (curr_gw)
- batadv_gw_node_put(curr_gw);
-out:
- if (router_ifinfo)
- batadv_neigh_ifinfo_put(router_ifinfo);
- if (router)
- batadv_neigh_node_put(router);
- return ret;
+ bat_priv->algo_ops->gw.print(bat_priv, seq);
+
+ return 0;
}
+#endif
-int batadv_gw_client_seq_print_text(struct seq_file *seq, void *offset)
+/**
+ * batadv_gw_dump - Dump gateways into a message
+ * @msg: Netlink message to dump into
+ * @cb: Control block containing additional options
+ *
+ * Return: Error code, or length of message
+ */
+int batadv_gw_dump(struct sk_buff *msg, struct netlink_callback *cb)
{
- struct net_device *net_dev = (struct net_device *)seq->private;
- struct batadv_priv *bat_priv = netdev_priv(net_dev);
- struct batadv_hard_iface *primary_if;
- struct batadv_gw_node *gw_node;
- int gw_count = 0;
-
- primary_if = batadv_seq_print_text_primary_if_get(seq);
- if (!primary_if)
+ struct batadv_hard_iface *primary_if = NULL;
+ struct net *net = sock_net(cb->skb->sk);
+ struct net_device *soft_iface;
+ struct batadv_priv *bat_priv;
+ int ifindex;
+ int ret;
+
+ ifindex = batadv_netlink_get_ifindex(cb->nlh,
+ BATADV_ATTR_MESH_IFINDEX);
+ if (!ifindex)
+ return -EINVAL;
+
+ soft_iface = dev_get_by_index(net, ifindex);
+ if (!soft_iface || !batadv_softif_is_valid(soft_iface)) {
+ ret = -ENODEV;
goto out;
+ }
- seq_printf(seq,
- " Gateway (#/255) Nexthop [outgoingIF]: advertised uplink bandwidth ... [B.A.T.M.A.N. adv %s, MainIF/MAC: %s/%pM (%s)]\n",
- BATADV_SOURCE_VERSION, primary_if->net_dev->name,
- primary_if->net_dev->dev_addr, net_dev->name);
+ bat_priv = netdev_priv(soft_iface);
- rcu_read_lock();
- hlist_for_each_entry_rcu(gw_node, &bat_priv->gw.list, list) {
- /* fails if orig_node has no router */
- if (batadv_write_buffer_text(bat_priv, seq, gw_node) < 0)
- continue;
+ primary_if = batadv_primary_if_get_selected(bat_priv);
+ if (!primary_if || primary_if->if_status != BATADV_IF_ACTIVE) {
+ ret = -ENOENT;
+ goto out;
+ }
- gw_count++;
+ if (!bat_priv->algo_ops->gw.dump) {
+ ret = -EOPNOTSUPP;
+ goto out;
}
- rcu_read_unlock();
- if (gw_count == 0)
- seq_puts(seq, "No gateways in range ...\n");
+ bat_priv->algo_ops->gw.dump(msg, cb, bat_priv);
+
+ ret = msg->len;
out:
if (primary_if)
batadv_hardif_put(primary_if);
- return 0;
+ if (soft_iface)
+ dev_put(soft_iface);
+
+ return ret;
}
/**
projects / cascardo / linux.git / blobdiff